>-----Original Message----- >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] >Sent: 29 March 2006 22:43 >To: Microcontroller discussion list - Public. >Subject: Re: [EE] Analog sampling > > >> >> If you want to formalize this, sample according to a poisson >interval >> distribution. Any aliases then become white noise added to the >> sampled signal instead of appearing having a fixed frequency >> relationship with the undersampled signal. Note that you can never >> make the energy in undersampled frequencies go away. This technique >> essentially spreads it out over the output spectrum. > > >That was my understanding, working similarly to how a spread >spectrum receiver "dissapears" any conventional carriers in >it's input range. I wasn't worried about making things >completely quiet so much as avoiding any aliasing problems >since this is part of a control loop. In the process this is >controlling, we have gain and phase shift, and all we need is >a coherent signal with 180 degree phase shift through the >process and things could get very entertaining. > >I just thought it was fun and wanted to pass it on to the group. Does the control loop also run at the sample rate? Regards Mike ======================================================================= This e-mail is intended for the person it is addressed to only. The information contained in it may be confidential and/or protected by law. If you are not the intended recipient of this message, you must not make any use of this information, or copy or show it to any person. Please contact us immediately to tell us that you have received this e-mail, and return the original to us. Any use, forwarding, printing or copying of this message is strictly prohibited. No part of this message can be considered a request for goods or services. ======================================================================= -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist